Alert archive / Alabama / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 83, NWS Mobile, AL

April 4, 2001Clarke County, Marengo County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 4, 2001, 6:50 AM CDT for Clarke County, Marengo County, Alabama. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Apr 4, 2001, 6:50 AM CDT (11:50 UTC)
Expired: Apr 4, 2001, 7:15 AM CDT
In force: 25 min
Issued by: NWS Mobile, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Clarke County, AL, Marengo County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 4, 6:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 11.8 hours before the alert went out and 164 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: -239 J/kg
Mixed-layer LCL: 547 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KMOB 041151
SVRMOB

ALC025-091-041215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
650 AM CDT WED APR 4 2001

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLARKE COUNTY IN SOUTHWEST ALABAMA
  MARENGO COUNTY IN SOUTHWEST ALABAMA

* UNTIL 715 AM CDT

* AT 650 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTHWEST OF NANAFALIA...MOVING EAST AT
  30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HOLTAMVILLE...OPINE BY 655 AM CDT
  TALLAHATTA SPRINGS BY 700 AM CDT
  SWEET WATER...BASHI BY 705 AM CDT
  DIXONS MILL...MILLER BY 710 AM CDT'

STRONG WIND...LARGE HAIL...AND HEAVY RAIN ARE LIKELY WITH THIS 
STORM.  IF IN THE PATH OF THIS STORM...TAKE COVER IN A STURDY 
SHELTER UNTIL THE STORM HAS PASSED.

LAT...LON 3215 8804 3187 8807 3185 8769 3219 8764

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 3, 7:08 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	17 min
Apr 3, 7:22 PM CDT	Severe Thunderstorm Warning	MOB	Washington	23 min
Apr 3, 9:31 PM CDT	Flash Flood Warning	MOB	Clarke, Washington	89 min
Apr 3, 9:40 PM CDT	Severe Thunderstorm Warning	MOB	Monroe	35 min
Apr 4, 7:50 AM CDT	Flash Flood Warning	MOB	Marengo	85 min
Apr 4, 8:15 AM CDT	Flash Flood Warning	MOB	Choctaw	90 min
Apr 4, 8:58 AM CDT	Severe Thunderstorm Warning	MOB	Washington	32 min
Apr 4, 9:01 AM CDT	Severe Thunderstorm Warning	MOB	Butler	19 min
Apr 4, 9:30 AM CDT	Severe Thunderstorm Warning	MOB	Washington	30 min
Apr 4, 9:45 AM CDT	Flash Flood Warning	MOB	Choctaw	90 min
Apr 4, 12:36 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	24 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.